Lock



LOCK Filed Sept. 26. 1929 r 2 Sheets-Sheet l -l INVENTOR thcobfi z'edma[71:72. BY

ATTORN EY June 16, 1931.

J. FRIEDMAN 1,810,760

LOCK

Filed Sept; 26. 1929 2 Sheets-Sheet 2 IN VENTOR Jacob Fr zedm anATTORNEY Fatentecl June 16,

UNITED STATES PATENT OF -ICE JAGOBFFIRIEDMAN, or nnw YORK,1\T; Y.

Application filed September- 26, 1929. Serial No. 395,389.

This invention relates to looks, the general object of the inventionlock that it will be practically burglar proof by making the lockingbolt hook shaped so they will make'a positive. connection witht-hekeeper. r a a Anotherobject oftheinvention is to provide a lock of thegeneral type indicated above which shall be of simple construction andpositive in operation, which shall be adapted to be applied to either aswinging .or a ing door and which shall be so constructed as toeffectively prevent; an unauthorized entrance through the door. 7 I

Other objects wlll appear as progresses. The "drawings are intendedmerely to indicate a possible embodiment of the invention; It is obviousthat the needs of manufacture may necessitate certainmeclianical changesIt is therefore not intended to limit the invention to the embodimentillustrated but ratherto define-such'limits in the appended claims. o vi In brief'the invention mainly consists of a slidingplate orboltactuator to whichare pivoted a pair of hooked bolts which engage.

or disengage-with the keeper-when the key or; knob is turned.

For a more generalunderstanding of the I invention attention is calledto the drawings. In these dra-wings likenumerals, indicate like partsthroughout the specification. y i Figurel is a sectional view of thelock and keeper showing them disengagedjirom each other, i e j Figure 2is a similar view as Figure l-but with the bolts partly in a lockedposition;

Figure 3 is'another'view 'similarlto Figure 1 but showing the bolts in afully. locked position. w

Figure 4 is a! section on line l -4: of urel.

Figure is asection on line 5-5 of ure2mv Referring now-to the drawingsin detail numeral 1 designates the casing for the lock which may bebolted on thedoor or other structum to be openedand 2 the keeperattached to a stationary part of abuilding.

Within the casing is sliding-bolt actuator 3 being to so form the boss 901 thekeeper.

, port 10 is a lever loosely and pivotally slidthe disclosure with aslot 17 formed to clear the locking "The neutral position of thesupported by the slides 41: and 5. Pivoted to the bolt actuator on thepins 6 and 7 are two hook shaped bolts S'ada'pted to engage with. Alsopivoted to the pins (Sand 7 and normally resting on the sup- 11.- Thepins 6 and 7 are permanently attached. to the bolt actuator 3 buthowev'er the bolts 8 and lever 11 are: mounted-thereon, 1 As noted inFigures 4 and 5a cylinder lock 12-is mounted in the door and held inplace by any suitable means. The cylinder lock 1 has the usualkey'opening with which the key 13 is inserted for rotating the key plug14 and operating the lock. This cylinder lock may be of anyappropriatedesign such as is now used in conventional locks; Fixed to thekeyplug14: are two cam arms 15 and ldwhich alternately engage and disengage inthe bolt actuator 3. 7 The bolt actuator 8 is slotted as at 18 in orderlug- 10 when the said actuator'slides on its supports. e

cam arms 15 and 16 is as shown in Figures 1 and 3. To

retain the arms in this position a pair of [springs 19 are provided theperiphery of the key plug 14;. Cut in the periphery of thekey plug,aretwo flattened which bear against portions 20. 86

WVhen' the ends. of the springs come in con:

tactwiththe said flattened portions the key plug will be locked in placeand any 'acci dental turning will be prevented. I

Attached to thekey plug'l l and extending I outward of the casingyl isaV knob 21 for actuating the cams 15 and 16. This-knob is) directlyopposite'the cylinder lock 12. As, noted inFigures 3, t and 5 the keyisadapted toenter the end of the key plugli. (It will the key plug can; be

thus be apparent that revolved by the key on the outside of the door Vor bythe knob ontheinside ofthe door.

The operation of this device is as follows. Asshownzin Figure 1 thedevice is inxthe 95 unlocked position. To lock the door the key or knobis turnedguntilthe cam arm 16 lifts the lever: 11 as shown inFigure 2thereby disengaging the notch. 22 of the lever from the locking lug 10,1At the sametime the 19K nates the various screv.

cam arm 16 will move the bolt actuator 3 and the parts associatedtherewith towards the keeper. The hook shaped bolts 8 will then passthrough the openings 23 of the easing and envelop the boss 9 as shown inFigure 3. When it has reached this position the lever 11 will drop downuntil th notch 24 will register with the locking lug 10 and thereby holdthe lever, bolt actuator and its associated parts in further actuated bythe knob or key. To keep the lever ll normally in a horizontal positiona. torsion spring 25 is provided.

One end of the s n-in g is attached to the piv oting point of the leverwhile the opposite end is fastened to a lug 26 attached to the boltactuator. While the movement of the bolt actuator in a horizontal planethe hook shaped bolts will describe a circular or enveloping movementwhen the bolt actuator is moved towards the keeper. This is due to thecurvature of the bolts when passingjust wide Numeral 27 desigfor holdingthe device in place and 28 an inside detachable cover plate for havingaccess to the mechanism.

It will thus be seen that I have provided a simple efficient lock whichcan easily be attached and can be used for hinged or sliding doors. Theshape of the bolts or looking ends makes for an efficient type oflockfor the reason that the said bolts when engaging the boss of the l:eper, act hooks and are not easily displaced. Also when in a lockedposition the bolts are concealed and protected so that tampering withthe lock is extremely difficult. Furthermore the employment of-aplurality of bolts of this construction which are movable independentlyof each other is desirable for the reason that an entrance through thedoor cannot be forcing; one of the locking bolts from its engagementwith the keeper as that in no wise affects the locking position of theother lookthrough the openings which are enough to guide the bolts.

ing bolt which must also be forced out of its locking position betorethe door may be opened. p

The lever 11 provided with a double set of notches 22 and 24 whichregister alternately with the locking lug 10. By this arrangement thebolts 8 cannot be moved unless the lever 11 raised by the turning of thekey 'or knob.

Having described my invention, I claim 1. In a lock of the classdescribed comprising a casing, a keeper, a bolt actuator slidablysupported in saidcasing, a pair of'pivots attached to the forward partof said bolt actuator, one of said pivots having attached thereto a hookshaped bolt, the other of said pivots'having attached thereto aco-operating hook shaped bolt and a lever, said lever having a pair ofnotches which correspond to the locked and unlocked positions of theplace until the lock is gained by merelyto a hook shaped bolt, the otheror" said pivots having attached thereto a co-operating hook shaped boltand a lever, said lever having a pair of notches which correspond to thelocked and unlocked positions of the bolts, a locking lug which engageswith said notches for preventing any accidental movement of the boltactuator, and a pair of cams for si multaneonsly lifting one end of saidlever and moving said bolt actuator.

3. In a lock of the class described comprising a casing, a keeper, abolt actuator slidably supported in said casing, a pair of pivotsattached to the forward part of said bolt actuator, one of said pivotshaving attached thereto a hook shaped bolt, the other of said pivotshaving attached thereto a cooperating hook shaped bolt and a lever, saidlever having a pair of notches which correspond to the locked andunlocked positions of the bolts, a locking lugwhich en ages with saidnotches for preventing any accidental movement of the bolt actuator, anda pair of cam arms for contacting at the same time with said lever andsaid bolt actuator for lifting said lever and moving said bolt actuatorsimultaneously.

. 4:. In a look of the class described comprising a casing, a keeper, abolt actuator slidably supported in said casing, a pair of pivotsattached to the forward part of said bolt actuator, one of said pivotshaving attached thereto a hook shaped bolt, the other of said pivotshaving attached thereto a co-operating hook shaped bolt and a lever,saidlever having a pair of notches which correspond to the locked andunlocked positions of the bolts, a locking lug which engages with saidnotches for preventing any accidental movement of the bolt actuator, apair of cams for moving said bolt actuator, a pair of flattened portionsin said cams, and a pair of springs which engage said flattened portionsand normally keep said cams in a horizontal posi tion.

5. In a lock of the class described comprise ing a casing, a keeper, abolt actuator slidably supported in said casing, a pair of pivotsattached to the forward part of said bolt actuator, thereto a hookshaped bolt, the other of said pivots having attached thereto aco-operating hook shaped bolt and a lever, said lever having a pair ofnotches which correspond to the locked and unlocked positions of theb0lts,'a locking lugwhich engages with-said notches one of said pivotshaving attached for preventing any accidental movement of I the boltactuator, a pair of cams for simultaneously lifting one end of saidlever and moving said bolt actuator, a pair of flattened 1 5 portions insaid cams, and a pair of springs which engage said flattened portionsand normally keep said cams in a horizontal position. 7 i

, 6;In a lock of the class described compris- 10 ing a casing, a keeper,a bolt actuator slidably supported in said casing, a pair of pivotsattached to the forward part of said bolt actuator, one ofsaid pivotshaving attached thereto a hook shaped bolt, the other of said vpivotshaving attached thereto a co-operating hook'shaped bolt and a lever,said lever having a pair of notches which correspond to the locked andunlocked positions of the bolts, a locking lug which engages with saidnotches go for-preventing any accidental movement of the bolt actuator,a pair of cam arms for con- 7 tacting at the same time with said leverand said bolt actuator for lifting said lever and moving said boltactuator simultaneously, a pair of flattened portions in said cams, anda pair of springs which engage said flattened portions and normally keepsaid cams in a horizontal position. In testimony whereof I afliX mysignature. 3() JACOB FRIEDMAN.

